aFe Power Momentum HD 54-74003 GM Diesel Truck 06-07 V8-6.6L (td) LLY/LBZ Performance Intake System (Oiled, 5-Layer Filter) Outflows the factory intake by 57% . Produces an additional 21 horsepower and 56 lbs. x ft. torque 5-Layer progressively finer oiled, washable cotton gauze media allows maximum airflow for maximum power Smooth one-piece sealed housing with unique filter to housing interface (patent pending) for easy installation Also features a CAD designed, dyno tuned roto-molded intake tube and an auxiliary air scoop This product is not CARB exempt at this time and is not legal for sale in California or use on vehicles registered with the California Department of Motor Vehicles.